import axios from 'axios'
import { Notification, MessageBox, Message, Loading } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { tansParams, blobValidate } from "@/utils/icoolkj";
import cache from '@/plugins/cache'
import { saveAs } from 'file-saver'
import router from '@/router'
let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { show: false };

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 100000
})

// request拦截器
service.interceptors.request.use(config => {
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
  if (getToken() && !isToken) {
  config.headers['Authorization'] = 'Bearer ' + getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
}
// get请求映射params参数
if (config.method === 'get' && config.params) {
  let url = config.url + '?' + tansParams(config.params);
  url = url.slice(0, -1);
  config.params = {};
  config.url = url;
}
if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
  const requestObj = {
    url: config.url,
    data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
    time: new Date().getTime()
  }
  const sessionObj = cache.session.getJSON('sessionObj')
  if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
    cache.session.setJSON('sessionObj', requestObj)
  } else {
    const s_url = sessionObj.url;                  // 请求地址
    const s_data = sessionObj.data;                // 请求数据
    const s_time = sessionObj.time;                // 请求时间
    const interval = 1000;                         // 间隔时间(ms)，小于此时间视为重复提交
    if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
      const message = '数据正在处理，请勿重复提交';
      console.warn(`[${s_url}]: ` + message)
      return Promise.reject(new Error(message))
    } else {
      cache.session.setJSON('sessionObj', requestObj)
    }
  }
}
return config
}, error => {
  console.log(error)
  Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(res => {
  // 未设置状态码则默认成功状态
  const code = res.data.code || 200;
// 获取错误信息
const msg = errorCode[code] || res.data.msg || errorCode['default']
// 二进制数据则直接返回
if (res.request.responseType ===  'blob' || res.request.responseType ===  'arraybuffer') {
  return res.data
}
if (code === 401) {
  if (!isRelogin.show) {
    isRelogin.show = true;
    MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', { confirmButtonText: '重新登录', cancelButtonText: '取消', type: 'warning' }).then(() => {
      isRelogin.show = false;
    store.dispatch('LogOut').then(() => {
      router.push('/login');
  })
  }).catch(() => {
      isRelogin.show = false;
  });
  }
  return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
} else if (code === 500) {
  Message({ message: msg, type: 'error' })
  return Promise.reject(new Error(msg))
} else if (code === 601) {
  Message({ message: msg, type: 'warning' })
  return Promise.reject('error')
} else if (code !== 200) {
  Notification.error({ title: msg })
  return Promise.reject('error')
} else {
  return res.data
}
},
error => {
  console.log('err' + error)
  let { message } = error;
  if (message == "Network Error") {
    message = "后端接口连接异常";
  } else if (message.includes("timeout")) {
    message = "系统接口请求超时";
  } else if (message.includes("Request failed with status code")) {
    message = "系统接口" + message.substr(message.length - 3) + "异常";
  }
  Message({ message: message, type: 'error', duration: 5 * 1000 })
  return Promise.reject(error)
}
)

// 通用下载方法
export function download(url, params, filename, config) {
  downloadLoadingInstance = Loading.service({ text: "正在下载数据，请稍候", spinner: "el-icon-loading", background: "rgba(0, 0, 0, 0.7)", })
  return service.post(url, params, {
    transformRequest: [(params) => { return tansParams(params) }],
  headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
  responseType: 'blob',
...config
}).then(async (data) => {
    const isBlob = blobValidate(data);
  if (isBlob) {
    const blob = new Blob([data])
    saveAs(blob, filename)
  } else {
    const resText = await data.text();
    const rspObj = JSON.parse(resText);
    const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
    Message.error(errMsg);
  }
  downloadLoadingInstance.close();
}).catch((r) => {
    console.error(r)
  Message.error('下载文件出现错误，请联系管理员！')
  downloadLoadingInstance.close();
})
}

export default service
